深开挖后土体卸荷导致隧道隆起变形的算法  

The Algorithm of Tunnel Heave Deformation Caused by Soil Unloading After Deep Excavation

作　　者：王振峰[1] 赵婷 徐明霞[1] 刘红霞[1] WANG Zhenfeng;ZHAO Ting;XU Mingxia;LIU Hongxia(Shaanxi Institute of Technology,Xi’an 710300,China;Xi’an Wenchang Libao Information Technology Co.,Ltd.,Xi’an 710065,China)

机构地区：[1]陕西国防工业职业技术学院,西安710300 [2]西安文昌历保信息科技有限公司,西安710065

出　　处：《工业建筑》2022年第3期53-59,104,共8页Industrial Construction

基　　金：2021年陕西省教育厅专项科研计划项目(21JK0506)。

摘　　要：为提高隧道施工的安全性,对基坑施工造成的隧道变形情况的计算方法进行了研究。对导致隧道发生隆起变形的影响因素进行了分析,并对基坑土体发生损失造成的隆起变形进行简化处理;对基坑开挖后土体卸荷导致的隧道附加荷载和隧道的地基梁刚度采用了两阶段分析法进行了计算;最后,借助有限元分析方法对西安市2号线上方市政施工导致的隧道变形进行了模拟分析。研究结果表明:采用Pasternak模型,Winkler模型和Kerr模型对隧道变形进行了计算,发现Kerr模型的求解结果更加准确。To improve the safety of tunnel construction, the calculation methods for tunnel deformation caused by calculation methods deep aucavation construction were discussed. The influencing factors of heave deformation on tunnels were analyzed, and the for heave deformation caused by unloading during excavation were simplifien. The additional load on tunnels and foundation beam stiffness of tunnels caused by unloading in excavation were analyzed by two-stage analysis method. Finally, the finite element analysis method was used to analyze the tunnel deformation caused by municipal construction of Line 2 in Xi’an. The results showed that: The application of two-stage stress analysis method successfully calculated the additional load on the tunnel caused by unloading deep excavation. The Pasternak model, Winkler model, and Kerr model were used, and the Kerr model was more accurate.

关 键 词：Kerr模型 有限元分析法 两阶段分析法 隧道变形 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]